Hard rock drilling and splitting tunneling method and device

Abstract

The invention discloses a hard rock drilling and splitting tunneling method and device. The hard rock drilling and splitting tunneling method comprises the steps that a slotted hole is drilled in a preset contour line of a tunnel face, splitting holes are drilled in all preset splitting lines, and splitting operation is conducted in the splitting holes in all the preset splitting lines, wherein the preset contour line is a closed annular line, at least two preset end points exist on the preset contour line, one point in the delineated range of the preset contour line serves as a preset midpoint, and the connecting lines of the preset midpoint and all the preset end points form all the preset splitting lines correspondingly. The slotted hole is drilled in the preset contour line of the tunnel face, a splitting space is clearly divided, and back break can be effectively avoided; and area division is conducted in the space through the preset splitting lines, the splitting holes are drilled in all the preset splitting lines, and splitting operation is conducted, so that drilling-splitting-deslagging operation can be conducted in order, and the construction efficiency is improved advantageously.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a hard rock drilling and splitting excavation method and device. Background technique [0002] In rock stratum tunnel excavation engineering, drill and blast method and TBM excavation method are commonly used construction methods. Due to a series of problems such as impact, noise, dust, poisonous smoke, and flying stones caused by blasting in drill and blast construction, the restrictions are positive. It is becoming more and more strict, especially in densely populated areas such as cities and buildings, and it is basically unusable; due to the limitation of the rock-breaking ability of the hob in TBM tunneling, in the areas with high rock strength and good integrity, there are tools and energy. High consumption and slow excavation speed cause problems such as delay in construction period and rising cost. In particular, the cost of TBM is high and the manufacturing cyc...

AI Technical Summary

Problems solved by technology

To split the rock, it is necessary to pre-create a free surface for the displacement of the rock block. At present, it is mainly realized by intensive drilling. There is no obvious limitation on the scope of construction on the drill face, and it is difficult to avoid over- and under-excavation.

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